forked from luon/wordclock
93 lines
1.9 KiB
C++
93 lines
1.9 KiB
C++
/*
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Example sketch for interfacing with the DS1302 timekeeping chip.
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Copyright (c) 2009, Matt Sparks
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All rights reserved.
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http://quadpoint.org/projects/arduino-ds1302
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*/
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#include <stdio.h>
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#include <string.h>
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#include <DS1302.h>
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/* Set the appropriate digital I/O pin connections */
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uint8_t CE_PIN = 5;
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uint8_t IO_PIN = 6;
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uint8_t SCLK_PIN = 7;
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/* Create buffers */
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char buf[50];
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char day[10];
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/* Create a DS1302 object */
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DS1302 rtc(CE_PIN, IO_PIN, SCLK_PIN);
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void print_time()
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{
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/* Get the current time and date from the chip */
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Time t = rtc.time();
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/* Name the day of the week */
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memset(day, 0, sizeof(day)); /* clear day buffer */
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switch (t.day) {
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case 1:
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strcpy(day, "Sunday");
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break;
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case 2:
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strcpy(day, "Monday");
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break;
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case 3:
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strcpy(day, "Tuesday");
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break;
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case 4:
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strcpy(day, "Wednesday");
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break;
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case 5:
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strcpy(day, "Thursday");
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break;
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case 6:
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strcpy(day, "Friday");
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break;
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case 7:
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strcpy(day, "Saturday");
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break;
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}
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/* Format the time and date and insert into the temporary buffer */
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snprintf(buf, sizeof(buf), "%s %04d-%02d-%02d %02d:%02d:%02d",
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day,
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t.yr, t.mon, t.date,
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t.hr, t.min, t.sec);
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/* Print the formatted string to serial so we can see the time */
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Serial.println(buf);
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}
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void setup()
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{
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Serial.begin(9600);
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/* Initialize a new chip by turning off write protection and clearing the
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clock halt flag. These methods needn't always be called. See the DS1302
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datasheet for details. */
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rtc.write_protect(false);
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rtc.halt(false);
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/* Make a new time object to set the date and time */
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/* Tuesday, May 19, 2009 at 21:16:37. */
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Time t(2009, 5, 19, 21, 16, 37, 3);
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/* Set the time and date on the chip */
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rtc.time(t);
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}
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/* Loop and print the time every second */
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void loop()
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{
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print_time();
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delay(1000);
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}
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